Apparatus for the treatment of ammonium sulfate.



J. VORRABER. APPARATUS FQR THE TREATMENT OF AMMONIU'M SULFATE;APPLIOATIOI FILED NOV. 21 1910, 1,066,067.

3 m L m )E H Um m m n m9 8 t a P u j z 5 may Jaw mark:

J. VORRAB'BR. APPARATUS FOR THE TREATMENT OF AMMONIUM SULFATE.APPLIOATIOI I'ILBD NOV. 21, 1910.

1,066,067. Patented Jul 1, 1913.

R BHEBTHHBET 2.

UNITE STATE PATENT orricn.

Josh's vommnmz, or coLoGuE-LImnTHAL, GERMANY;

areas-arcs aw THE TREATMEN'E or Ammonium" SULFATE.

Specification 0! Letters Patent.

Patented July I 1913'.

.Applicafim filed Rovembe: 21, i910. Serial No. 583.478.

To all "11340112 it may concern:

Be-it known that I, Josue Vommnemeuglneer, asubject of the GermanEmperor,

residing, at 61 Hil-lerstrasse, Cologne- Li ndtinthal' vKingdom ofPrussia, Germany, have invented "new and useful Improvemenisin Apparatusfor the Treatment of Ammonium Sulfate, of which the following is, aspecification.

.Thepresent invention relates to aumachine for the dustfree drying andgrinding 01 ammonium sulfate and simultaneously cooliug'the roastedammonium sulfate, as this leaves the runners at 1: temperature of about:antlat such a.- temperature is] irerymimh nclined to-' cake,if it is notspread "lion aushorlg while in the storage room as soon asit leaves theapparatus.

'Fhis machine consists essentially of a double, walleddrum heated bydirect sources of he at'on both the outside and the. "inside: 'The wallsofv the drum inclose a hollow space, in which the ammonia sill fate,which has been crushed by rollers and finely disintegrated by specialdevices, is

conducted toward the hot'e'ases, which enter from below into the d-rum..The-dried. amnioniasulfate-j advancing toward the one end of t-he drumpasses between two. revoiving 'annular runners with tang ential burs, soarranged thatthe gap between them can be varied... These runners willfinely grind an'dconvey the dried ammonia, Without the hygroscopiccharge coming in Contact with the humid atmosphere: The closing. head ofthe drum is fitted. with vanesextending beyond the gap between therunners, which vanes mix the induced air with the tdharg ef v so that.the particles of the ground salt are brought into contact with line coldair and are forced at an iucreasing'velocity upward ,in a contractedshaft. In consequence of the sudden widening of the tube with downwardin lined passages at its sides, mountion longiflulinul section throughthe ma chine. Fig. is across section along A.

m Fig. 1 Fig. 3 is a cross section through the cooling attachment alongBel; in 0- Fig. 1. The outer shell I of the drumiscon- "uccted by meansof 'a plurality of tubes 2 with the inside tube 3, so that a doublewall-led: or jacketed-drum is formethand on the one hand, the ammoniumsulfate to be dried. can. be freely passed between the walls 1 and 3 andout the other hand, the hot gases Team be forced by the suction of a/fan together with hot dry air from the space outside around the drumthrough tubes into tube 3 and through the ammonia-sulfate to be dried.

Beneath the drum and inside the drumare introduced pipes 4: and 6connected to 7.5

a gas supply and fitted with burner; tubes 7 and 5, which areprovided'on their upper sides with a large number-of small burner holesso as to allow of heating the walls of the drum and particularly theairentering into the same and to conduct the air to.- ward the ammoniasulfate flowing down through the hollow space 18 from the con- .veyergutters. The hot gasesmixed with steam are,v on emerging/from the space18,

passed through the filter chamber 10 and the cloth fitter 11", and drawnoff through an outlet 19 to which an exhauster or similar suitable meansmay be connected for. forcing the gases through the filter 1:1,; Themoist ammonium sulfate is supplied to the hopper 2D and is seized by thetoothem rollers 23 and then disintegrated- It; is

essential for the drying process that: thev sp'ecd orthe rollers beadapted .to themois-os ture of. the charge so that; the supply ofammonizi=- snlfate to the drying chamber 18!, in the jacketed drum! 1/3is a one and the rollers will act as regulators forthe drying andventilating Thecoilveyer- 1'00 webs 8 and 9 on the Walls of the space18, receive the ammonia sulfate to dried and impart toit arforwa'rdstrewing motion so that the hot gases passingthrougiiare offeredmanysurfacesof: attack, sotthat an intensedrying eifect is obtained andit is possible todry large quantities, at-a time in acomparativelysliort'drztm; monia sulfate emergiw' from h drum falls intotha mzp between theruunenallo 16, 1'7, which receive it for furthergrinding it. This gapis wider on the lflSldi1l1lilIli01L the Home. Thetoothed, chilledcastrunners 17 consisting of a plurality of seg.

llltzl ly consistency at a moderate speed of' revoli-ition. The upperrunner 21, which at .the Smile time serves to close the drum is"jtltlthltlltfl with its pm 4 1 in two bearings and is driven hvnreansof sprocket wheels 25 from the. eountershaft 22 'at the side of theapparatus. The runner 16 cons sts also here oi a plurality of segmentswith teeth, which are coarse'inside and are reduced toward the outs'ide.The slanting teeth terminate preferably at. thecircumference of therunners so that a. smooth annular surface, a few millimeters wide,remains.

The closing runner 21 is provided on its face end, behind the runner .16with tan gentially arranged short vanes Qt, the ends 2:1 ofwhich have aradial direction at their circumference and reach over the runner 17.The ends 25 of these vanes are slightly inclined and the ends are bentforward over the runner 17 so as to keep the charge together at thesides and top.

The lower half of the grinding apparatus is closed by a sheet metalpartition .26 against the passages 4.0, H; and the shaft 31 is providedwith plates 32, forming with the wall 34 ofisaid shaft a chamber.

The 'chargr fallsfrom the grinding apparatus into a hopper l Lwvhichterminates in two sack spouts 4 3. The drying drum and the-grindingapparatus are inclosed-in a dustl'aroot"manuerhy a sheet metal shell",

a tan not shown) connected at-lfl \vill'tun" thermore suck any particlesof dust, which reach the joints, away into the dust chamber 10.

Qlhe front wall of shell 12 of the drying apparatus has a wide aperture35 which is separated by an annularav'all from the chamber 37 andthrough which the vanes 94, 25 will aspiratethe fresh air. By means ofslide 38 the quantity of air induced may be controlled. I

The rapid rotation of the runner ll with the thereto attached suctionvanes 24. and the conveying webs QFrwill throw the hot ammonia saltemerging from the gap of the grinder together with the simultaneouslyadmitted fresh air through the shaft 31; whereby the cold air can meetand cool the i individual particles of salt.

By the two back walls 32, 33 being sbobliquely fitted in the shafttwogconstrietionsof the latter are produced which in- 'below,'\vliicl1will convey the cooled amto throw it otl' at the crease the velocity ofthe escape of the air impregnated with ammonia salt.

The'suddenly widening chamber-39 overthe end of the shaftleaves a clearpassagefor the current of air and ammonia salt; the air will force theheavier ammonia salt aside where the latter will fall down.

By the walls of the shaft; and thewalls of the chambe1n39 two passagest0 and 41 are' formed, and by the wall 34; and the plates 32, 33 thechamber 0 is formed, which conduct the fallingammonia' salt; toanysuitable mechanism (not shown) arranged monia salt to the sack spouts.43 whence itis tilled into sacks. Fumes which may be still contained inthe ammonia salt will-be aspirated by the air currenttlowing throughslot. 42 and be carried up into a dust collecting chamber or be allowedto escape into the atmosphere.

By the grinding apparatus being arrange behind the discharge of thedrying drum, so that no moist air from outside has accessv and thecharge may therefore fall into the sacks quite dry and withoutraisingany dust, a possibility of a dustfree drying and grinding of ammoniumsulfate is obtainedwith this machizie which was hitherto un- 95 knownand this method therefore admits of the apparatus being arranged'ininhabited localities without any danger to the persons dwelling therein.I

I-claim: 1. A machine for the dustifree drying of ammonium sulfate,eoniprisinglin -combina tion, a drum havinginnei: and outer walls 1 orshells, tubes connectingsaid shells,',mea-ns. for supplying crushedammonium sulfate; 0 burners for heating "the inner and outer shells anda filter through which the hot gases from said shells are-drawnott,--.sub'- staiitially as described.

A machine for the dust-free "drying n and cooling of ammonium sulfate,comprising in cmnbination, inner and outer shells. a casing surroumlingsaid shells and containing a filtering chamber. connected with saidshells, a filter in said chamber through whi-ch the gasesare exhaustedthrough an outlet of said'ehamb'er'. tubescon'nect-ing said 7 shells,means for delivering crushed am-' monia. sulfatebetween said shells,burners.

for supplying hot air to the inner and outer shells and to the spacebetween sai'dshells, means for allowing the; exhaust of the gases 1throughsaidfiltergwi shaft leading from said casing, a head for-saidshells provided with vanes to throw the charge-into said 25 shaft, saidcasing having air-opening for admitting cold air to be inducedby theaction of the vanes and mixed with the charge.

3. A machine for the dustkfree drying and ceo'ling ofainmo nilimsulfate, compi'ising 'in combinat on, Inner and outer shells, tubesConnecting. said shells, burners supplyinghot V giir'fb the innei' endmiter shells and to' the space between seidishellgmeans for supply 'ingcrushed ammonium sulfateto the space between said shells, a easing,inelesing "said shells .and=.-pr6vided with a fil ering chamber a ndfilterthroiigh which said gases, are

adaptedto be drawn off from said shell, a shaft and a cold air inlet forsaid easing, a head closing said shellsand provided with 'va-nes fomihdn'cing cold air through said opening and mixing it with the chargeand and spaced apart-therefrom and objliquoly disposed plates on theremaining sides ufi saidshaft arranged .in sp'aecd relation, ui

stantiall'y as and for the purposo sut'fnrthl ln't estimony whereof Iafiix my sigunture in presence of two witnesses.

JOSE-F VORRABER. Witnesses: I

Louis VANDOR Y," FRANK SALONFJL

